Hi. Im looking into buying either the f90bt or z3?

got couple of questions.

 

The f90bt uses flash internal memory for the navi., how fast is the navi.?

 

How long does it usally take to route a destination?

 

Which navi is faster? the z or f? Z uses hdd navi and f uses flash internal memory.

 

how's the bluetooth on the f90bt? i have a iphone(the first one), does it pair well?

 

what is the usb for?

 

also can we use the sd memory card for mp3's, mpeg4 moviews, and divx movies?

 

F90bt comes with ipod cable, can i use the old ipod video 30gig? what about the iphone?

 

how do i know which firmware the f90bt has by looking at the box?

 

what would you guys recommend? what are the cons and pros?

 

thanks alot guys..